package com.atguigu.gulimall.member.exception;

/**
 * 用户名异常
 *
 * @author xiaoping
 * @create 2020/6/30 14:58
 * @since 1.0.0
 */
public class UsernameExistException extends RuntimeException {

    public UsernameExistException(){
        super("用户名存在");
    }

}
